Ophthalmic mounting



Patented July 21, 1936 UNITED STATES PATENT OFFICE OPHTHALMIC MOUNTINGApplication May 28, 1935, Serial No. 23,882

3 Claims.

The present invention relates to ophthalmic mountings and moreparticularly to means for attaching rimless mountings to lenses.

One of the objects of this invention is to provide an ophthalmicmounting having improved means for attaching it to a lens. Anotherobject is to provide an ophthalmic mounting having independent lensengaging. straps. A further object is to provide an ophthalmic mountingin which the lens engaging straps can be adjusted to retain lenses ofdifferent thicknesses. A further object is to provide an ophthalmicmounting which can be readily assembled and taken apart without the useof screws. These and other objects and advantages reside in certainnovel features of construction, arrangement and combination of parts aswill hereinafter be more fully set forth and pointed out in the appendedclaims.

Referring to the drawing:

Fig. 1 is an enlarged fragmentary front view of a lens connectionembodying my invention.

Fig. 2 is a rear view of same.

Fig. 3 is a horizontal section of same.

One embodiment of this invention is illustrated in the drawing wherein Iindicates a bridge which is secured to a lens I I by straps I2 and I3.The bridge I0 and shoe I4 are fixed to the strap I2 which has anaperture I5 opposite an opening I6 in the lens II. The strap I2 also hasa hole I! beyond the edge of the lens II and a groove I8 in the innersurface of the strap I2 extends between the aperture I5 and hole H.

The front strap I3 is preferably imperforate and has an anchoring meansopposite the opening I6, which comprises a cavity IS with a restrictedneck 20. Beyond the edge of the lens II, the strap I3 has a tongue 2Iwhich extends through the hole H in the strap I2. A groove 22 in theinner surface of the strap I3 extends from the anchoring meanslongitudinally along the strap I 3 and tongue 2I and a notch ordepression 23 is formed in the tongue and opens into the groove 22.

In assembling this mounting the lens II is placed between the straps I2and I3 and the tongue 2| is placed in the hole I I. With the membersheld in this position a fusible material 24 such as the pyroxylinmaterial sold under the trade name of Lumarith or a low melting pointmetallic alloy, is introduced through the aperture I 5 and heat isapplied. The fusible material 24 extends through the aperture I5and'opening I6 into. the anchoring means in the strap I3 and alsoextends along the grooves I8 and 22. After the fusible material 24 hashardened, the end of the tongue 2| extending through the hole I! beyondthe surface of the strap I2, is cut off. As the straps I2 and I3 areindependent, lenses of any thickness can be mounted and the fusiblematerial 24 extending along the grooves I8 and 22 completely fills thespace between the straps I2 and I 3 and the lens I I so that the lens istightly held even though the straps I2 and I3 do not rest exactly uponits surfaces.

From the foregoing it will be apparent that I am able to attain theobjects of my invention and provide an ophthalmic mounting having aconnection in which the straps are independent and can engage lenses ofdilferent thickness and form a tight and permanent union therewith.Various modifications can, of course, be made without departing from thespirit of my invention or the scope of the appended claims.

I claim:

1. An ophthalmic mounting comprising two independent spaced strapspositioned, respectively, on opposite sides of a lens having an opening,one of said straps having an aperture opposite said opening, the otherof said straps having anchoring means opposite said opening, one of saidstraps having a hole therethrough, a tongue on the other strap extendingthrough said hole, a groove in the inner face of the strap having thetongue, said groove being in communication with said opening andextending along said strap'and tongue, and a fusible retaining elementpositioned in'said opening and said aperture, engaging said anchoringmeans and filling said groove.

2. An ophthalmic mounting comprising twoindependent spaced strapspositioned, respectively, on opposite sides of a lens having an opening,one of said straps having an aperture opposite said opening, the otherstrap having an anchoring means opposite said opening, one of saidstraps having a hole therethrough beyond the edge of said lens, theother of said straps having a tongue extending through said hole, agroove in the inner face of the tongue extending along the strap and incommunication with said openin a groove in the inner face of the otherstrap also connecting the first groove and the opening, and a fusibleelement extending through said aperture and said opening, engaging saidanchoring means and filling said grooves.

3. An ophthalmic mounting comprising two independent spaced strapspositioned, respectively, on opposite sides of a lens having an opening,one of said straps having an aperture opposite said opening, a holebeyond the edge of the lens, and a groove in its inner surfaceconnecting said aperture and said hole, the other of said straps havinganchoring means opposite said opening,

7 a tongue adapted to extend through said groove and a groove in itsinner surface beginning at said anchoring means and extendinglongitudinally of said tongue and a fusible retaining member extendingthrough said aperture and said opening, engaging said anchoring meansand substantially filling said grooves.

CHESTER G. SALMON.

July 21, 1935.

. R. E. SANBORN GRAPE STEMMER Filed Feb. 23, 1935 Ralph dnborn

